Package org.apache.solr.search.function

Class NvlValueSourceParser

java.lang.Object
org.apache.solr.search.ValueSourceParser
org.apache.solr.search.function.NvlValueSourceParser
All Implemented Interfaces:
org.apache.solr.util.plugin.NamedListInitializedPlugin
public class NvlValueSourceParser extends org.apache.solr.search.ValueSourceParser
A sample ValueSourceParser for testing. Approximates the oracle NVL function, letting you substitute a value when a "null" is encountered. In this case, null is approximated by a float value, since ValueSource always returns a float, even if the field is undefined for a document.

Initialization parameters: - nvlFloatValue: float value to consider as "NULL" when seen in a field. defaults to 0.0f.

Example: nvl(vs,2) will return 2 if the vs is NULL (as defined by nvlFloatValue above) or the doc value otherwise

  • Field Summary

    Fields inherited from class org.apache.solr.search.ValueSourceParser

    standardValueSourceParsers

  • Constructor Summary

    Constructors
    Constructor
    Description
    NvlValueSourceParser()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    init(org.apache.solr.common.util.NamedList<?> args)
     
    org.apache.lucene.queries.function.ValueSource
    parse(org.apache.solr.search.FunctionQParser fp)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • NvlValueSourceParser

      public NvlValueSourceParser()

  • Method Details

    • parse

      public org.apache.lucene.queries.function.ValueSource parse(org.apache.solr.search.FunctionQParser fp) throws org.apache.solr.search.SyntaxError
      Specified by:
      parse in class org.apache.solr.search.ValueSourceParser
      Throws:
      org.apache.solr.search.SyntaxError

    • init

      public void init(org.apache.solr.common.util.NamedList<?> args)